1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0632836a1b18daec91b6608b868a1c6c0f4e97bf2d8d044540f1095697918c0e. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be21611c-a0ae-4856-98e9-4a168e302a42.json and https://artists.proofprofile.net/proofs/artist/be21611c-a0ae-4856-98e9-4a168e302a42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lohengrin, WWV 75, Act II: Des Königs Wort und Will' tu ich euch kund (Herald, Four Nobles, Friedrich, Four Pages)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eceda2db8d8bdad07cf460f5c9f0eace8660f449767929c0289503c38ac3cda. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421101021.
Lohengrin, WWV 75, Act II: Gesegnet soll sie schreiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc95f6f4affc31c897619220895442fc35a8d9a637df6b3d0311d73e18e1bfaa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421101022.
Lohengrin, WWV 75, Act III: Heil König Heinrich! (All The Men, The King, Four Nobles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f81852422c12f49812332b58cfe5ae2f43a6d96f60caa6fc76433a8bf60aa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421101034.
Lohengrin, WWV 75, Act III: Macht Platz dem Helden von Brabant! (The King, Lohengrin, The King's Men, Ladies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f79c46213b51d9cc3ecaa7144926f5bb4070d8985af247b980449fea896c61. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421101035.
Lohengrin, WWV 75, Act III: In ferner Land, unnahbar euren Schritten (Lohengrin, The King, Men, Women)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ccfc0d8bb829f70a45729141712e9be7e0fc567677e8bbfa5fc5eec67ee1e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421101036.